krb5-server - The KDC and related programs for Kerberos 5.

Kerberos is a network authentication system. The krb5-server package
contains the programs that must be installed on a Kerberos 5 key
distribution center (KDC). If you are installing a Kerberos 5 KDC,
you need to install this package (in other words, most people should
NOT install this package).